Researchers have encountered variants or isoforms in microRNAs (miRNAs) before, but assumed that these variants were accidental byproducts. A recent study from Thomas Jefferson University shows that certain so called isomiRs have abundances that depend on geographic subpopulations and gender and that the most prevalent variant of a given miRNA may not be the one typically listed in the public databases. The study is published … Continue reading Researchers begin to map function and expression of isomiRs of microRNA.